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How to Install a Bidet on a Tankless Toilet

Tankless Toilet

Whether you are moving to a new house or renovating your bathroom, installing a bidet is always a hassle. This becomes twofold difficult when one has to install a bidet on a tankless toilet. This is why many people prefer to hire a plumber for this work. But not everyone wants to throw dollars at people for just installing a bidet because, frankly, inflation is at an all-time high now, and most people are trying to save money.

So people turn to Google to learn how to install a bidet on a tankless toilet. Unfortunately, there aren’t any guides that explain the process in detail for laymen. I faced the same issue when I had to install a bidet on a tankless toilet. This is why I have decided to explain how to Install a Bidet on a Tankless Toilet. Everything is described clearly and simply here, so you should not have any difficulty in understanding. By the end of this blog, you will be ready to install a bidet. So without further ado, let’s get right into it.

The Shutoff Valve Method:

This method is best used with a warm water bidet attachment. If you don’t have one, you will need to make a few adjustments while installing. This is one of the easiest methods to install a bidet on a tankless toilet and I recommend that people with no prior experience use this method.

Step 1: Attach Supply Hose to the Coldwater Shutoff Valve:

Connect the supply hose of your warm water bidet attachment to the cold water shutoff valve. You should be able to find this vault beneath your bathroom sink. It is recommended to connect the valve to the cold water supply if you are not sourcing water from both hot and cold vales because otherwise, you will just get hot water.

Step 2: Shut off the Cold Water Valve:

After connecting the supply hose to the cold water valve, you need to turn the valve clockwise to shut it off.

Step 3: Shut off the Cold Water Sink Hose:

Now you need to disconnect the sink water supply hose. This hose connects the water supply valve to the faucet. You can disconnect it by turning it counterclockwise.

Step 4: Connect a 3/8″ T-Connector to the Cold Water Valve:

Next up you need to connect a 3/8″ T-Connector to the cold water valve you shut off earlier in Step 2. You can use a wrench to connect the connector and then turn it clockwise but make sure not to over-tighten it.

If you are using a warm water bidet attachment, then use the “hot water T-adapter”. If you don’t have a warm water bidet attachment, you would need a different T-adaptor designed specifically for skirted toilets.

Step 5: Attach the Cold Water Sink Hose to the adaptor:

You need to attach the cold water supply hose of the Sink to the T-adaptor and turn it clockwise. You can use a wrench here too.

Step 6: Connect the Bidet Hose:

Last but not least, connect one of the Bidet hoses to the adaptor and the other one to the bidet itself, and you are done installing the bidet.

If you want warm water, you can repeat the above-discussed steps for the hot water valve. Now you should be able to turn the water on and use your bidet.

Common Installation Challenges that People Face:

Finding the Right Extra Parts:

People struggle to find the right extra parts required for installing a bidet on a tankless toilet. A specific T-adaptor is required to install the bidet, and many buy the wrong adaptor, which can be bothersome and frustrating. This is a common installation challenge that people face during the process of installing a bidet.

Making Permanent Alterations to the Property:

People often have to drill holes in their walls for supply hoses. This is a permanent alteration to the property, and many will not be on board with it. Especially the people who are renting will be unable to drill the holes in the wall unless they have the owner’s permission, which is unlikely.

Confusing Guides and advice:

There are many confusing guides available online about installing bidets. Even shop owners that sell bidets can confuse people with vague and tactless advice. This is why many prefer to call a plumber and have them install the bidet instead of trying to install it themselves.

Wrapping Up:

Now you know how to install a bidet on a tankless toilet. You are ready to go ahead and install your bidet. You will face no problem while installing as long as you follow these instructions closely. If you want to read similar guides or are looking for the best tankless toilets, I suggest you visit Thank you.

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